 function getParameterValue(key){
            //先获取到浏览器地址栏的数据信息
            var host = window.location.search.substring(1);
            //alert(host)
            var strings = host.split("&");//deptno=2&name=xxx  [deptno=2,name=xxx]
            for(var i = 0;i < strings.length;i++){
                var string = strings[i];//deptno=2
                var split = string.split("=");//[deptno,2]
                if(key == split[0]){
                    return split[1];
                }
            }
            return null;
        }